Description of the issue: I am not able to publish/update campaign when
trying to switch from minimal navigation to the default one. If I start
creation of a campaign with a default template and then switch to forest
for example, an error occurs upon saving that says: Updating failed. Sorry,
you are not allowed to edit the _credit_text custom field. I've tried on
the dev site and there is no problem, but on stage and prod this issue
appears.